stiffy
noun
1
an erection. Also variants 'stiffie' and 'stiff'. UK, 1980.
2
in snowboarding, a stiff-legged jumping manoeuvre US, 1995.
3
an engraved invitation card. Upper-class society use; from the unbending quality of the card and the (stiff) formality of the occasion UK, 1982.
4
a computer disc. From the packaging SOUTH AFRICA, 1993