When a woman is on all fours with cum coming out equally from her arse and both sides of her mouth, the floor is level - she is a "spirit level".
by The Builder 71 February 16, 2009
by Stan Stanley stanforth May 3, 2019
Jim's been losing at three-card monty for 3 hours now - damn he's got a learning curve like a spirit level!
by Iain1977 January 29, 2008
whilst one is renovating a house and needs to determine the level of the newly constructed floor, he requests that a girl sits on the floor on all fours. He then proceeds to blow in each end and observe which end it drips out of giving him clear indication of which end of the floor is out of level.
by the two bob lobber March 11, 2012