Pronounced like onion with 'Gr' in front, and usually in the plural.

Singular: - A left (or right) sailor's testicle that has been grossly inflated by a true 'blow' job in some stinking back-street Asian or Arab port during shore leave.

Plural - (Gronions) The worst scenario. Both balls about to explode through over-inflation, usually brought about by the aforesaid vicious fellatio, but with the added intervention of the house madam sticking a finger up the rectum at the same time.
Ship's Doctor:

'You seem to have a severe case of the Gronions'.

Sailor:

'Is there any cure?'

Ship's Doctor:

'No; but if you're willing, I suggest you donate one to Arsenal and the other to Man. U.'
by Albert Woods September 08, 2007
green onions, chives, or scallions
Yo, can i get some gronions on my baked potato!?
by MikeJ0nez March 18, 2008

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