Accepted United Kingdom shortened form of Old Age Pensioner (OAP) and used on official documents in this form. This national agreed defination is also valid in Wales and with a degree of miss-pronunication valid in Scotland
I'm an OAP but I can understand your site

Wise old (over 65) year surfer
by carthisis April 4, 2005
Open Air Pub. Taking place on the lower field at McGill University at the beginning of each semester.
"Man, we spent, like, all afternoon at OAP. Then we went to Poli 227 totally trashed."
by claire February 3, 2005
Old Age Pensioner, Someone regularly seen using a 'zimmer frame' and carrying a colostomy bag. Possibly has an problem with an overactive thyroid gland.
Person 1: My Gran is going down the post office to get her pension
Person 2: Becuase shes an OAP.. Duh!! Fassyhole ._.
by Ferd January 3, 2005
1. An acronym for One Act Play.

2. A UIL competition in which a play with only one act is performed.
I made allstar cast in OAP!
by itsjustluck March 28, 2004
Over Affectionate Parents.
You walk into the room, and your beloved parents are going at it asif they're 40 year old amateur soft-porn stars.
It's enough to make any innocent teenager feel physically sick.
Olivia: 'I walked into the room today and my parents were totally making out and aahhh they make me sick! They're fucking OAP's.'
by opn94 June 22, 2009
Out And Proud
-Did you know Sam was gay?
-Not just gay, darling, he's OAP!
-OAP?
-Yeah, babe, Out And Proud!
by bertelmax (elcallejerocanela) February 1, 2010
a word that stands for OLD AGE PRICK
'give my my ball back mister'
'no!!'
'FUKIN OAP's'
by hawkstain July 29, 2006