the point where one is about to throw up due to a cock reaching too far down one's throat, whilst giving head.
the arsehole made me gag when he pushed my head down whilst I was giving him head... I ain't doing that again in a hurry!!!!!
by sassydragon October 23, 2003
Get the gagmug. by DarkMagicPaul96 November 10, 2009
Get the gagmug. by Butthole February 22, 2004
Get the gagmug. by msoe20 April 9, 2006
Get the gagmug. by tom nickel August 20, 2003
Get the gagmug. 
