A protective device that you put on before you Motorboat a woman with ample cans.  Also a visual aid to display your intent to said woman.
Ben, bored with two cats in the bath tub, buckled up his life jacket and dove into a hearty set of knockers head first.
by thed00d! January 21, 2009
Get the Life Jacketmug. by yamman1989 October 18, 2008
Get the life jacketmug. A common type of sleeveless jacket, also known as a Gilet. Often seen on the streets of the Royal Borough of Kensington on Chelsea.
by _LDN April 26, 2021
Get the Chelsea Life Jacketmug.