A situation in which a person is pressured into performing oral sex.
Tim and Erica had been dating for a few months. Tim told Erica to give him oral sex. She then found herself "under the gun."
by hesgotjokes March 27, 2011
describing someone who is under intense or extreme pressure.
I was under the gun to get that project done on time.
by hipster November 27, 2005
The first person to act in a betting round of poker.
I was under the gun with a pair of jacks.
by Naterz September 26, 2005