(Adj) To raise one thigh or buttocks prior to releasing built up gas in the lower intestine. Other wise known as "lifting up", lif'up is used in only emergency situations and is accompanied by a covering of the nose and mouth with both hands, thus preventing any lif'up residue from penetrating the nasal or oral cavity.
"It wuzn't me, I seen annieho lif'up!"
by BigBalla04 May 20, 2004