crack a fat

vulgar slang To have or get an erection of the penis. Primarily heard in Australia. Many pubescent boys are teased for involuntarily "cracking a fat" in public as their bodies change in unfamiliar and sometimes uncomfortable ways.

Common Names:

Name	Pronounced	Usage
Hortensia	[hɔ:'tensiə]
Cassia	KA-shə (English)	Ancient Roman
Odile	-	French
Sommer	['sʌmə]
Jamaar	jə-MAHR	African American (Rare)
Brittania	-	English (Rare)