Grumpy Cow 

verb The act of waiting until your wife, girlfriend or friend with benefits is asleep, then tipping her over so you can get some booty.

I treated my wife to a grumpy cow last night.

Grumpy Cow by westwardHo April 28, 2019

grumpy cowboy 

Like the reverse cowgirl, but while doing reverse pushups.

Zach Statler: I gave that girl a sick grumpy cowboy last night, it was so good she made me wear a cowboy hat and boots.

grumpy cowboy by xbassistdoodx September 6, 2010