A petticoat or underskirt is an article of clothing for women; specifically an undergarment to be worn under a skirt or a dress. The petticoat is a separate garment hanging from the waist (unlike the chemise).

In historical contexts (sixteenth to mid-nineteenth centuries), petticoat refers to any separate skirt worn with a gown, bedgown, bodice or jacket; these petticoats are not strictly speaking underwear as they were made to be seen. In both historical and modern contexts, petticoat refers to skirt-like undergarments worn for warmth or to give the skirt or dress the desired fashionable shape. In this context a petticoat may be called a waist slip or underskirt (UK) or half slip (US), with petticoat restricted to extremely full garments. Petticoat can also refer to a full-length slip in the UK, although this usage is somewhat old-fashioned.

Petticoat is the standard name in English for any underskirt worn as part of non-Western clothing, as with the sari.

The practice of wearing petticoats as undergarments was well established by 1585. Petticoats were worn throughout history by women who wanted to have the currently fashionable shape created by their clothing. The petticoat(s), if sufficiently full or stiff, would hold the overskirt out in a pleasingly domed shape and give the impression of a smaller waist than the wearer actually had. It would also complement the desired large bust.

The Guns are a four-piece rock band from South Wales. The current line-up consists of Alex Wiltshire (vocals and guitar), Adam Turner (lead guitar), Tom Coburn (bass guitar) and Chris 'Stix' Davies (drums). The band have stated that they would like to remain independent and have turned down numerous record deals as a result of that. As of 2012, The Guns have released two EPs, and two albums.

After the once popular South Wales band When Reason Sleeps, which contained the frontman for fellow Welsh band The Blackout, Sean Smith, broke up, lead singer Alex Wiltshire set out and recruited Adam Turner on lead guitar, Tom Coburn on bass guitar, and Kob on drums. The Guns were formed, and after a small amount of gigs, they were asked by Pontypridd band Lostprophets to support them during their Liberation Transmission tour, The Guns accepted the offer and went on to play on the main stage at The Full Ponty 2007. Also, during this period The Guns had started work on their debut album With The Guns, and had released a self-titled 3 track CD available through their Myspace and at gigs.