get one on

To indulge in a heavy drinking session

"I can't wait till 5 o'clock on Friday - I'm gonna seriously get one on."

by gimpboy January 25, 2008

bend one in

(v) to shag a girl in a semi-non-romantic moment

"How did it go with the bird from the chip shop last night?"
"Great - she paid for the pizza, and back at her place I managed to bend one in."

by GimpBoy April 13, 2006