yras 

a discreet way of mentioning someone's "donkey" body part.

get off yras and do somethin, ya bizzitch!

yras by fook yu September 24, 2003

yrast 

The dizziest, from the Swedish Yr.

Usually used in Nuclear Physics to describe the least energetic states related to given Nuclear Spins. Common term in Gamma Ray Spectroscopy.

Hulk sleepy. Hulk has yrast.

yrast by yraster November 22, 2010