look up any word, like the eiffel tower:
 
1.
Womens breasts. Abbr: originating from the cockney rhyming slang 'Threpenny Bits' (tits).
The lads decided another trip down to Margate was in order - in the height of summer it was always guaranteed that there would be plenty of 'threps' on show.
by chesterpest January 17, 2010
 
2.
boro rhyming slang.meaning shit.(threp being a shortened version of threpunny bit)
"ere mate them green flash are proper threp"
by cockerill and the lumphammer July 04, 2003