slang. Also 7 threpps, 8 threps. Short for THREEPENCE.
a. 1700. B. E., Dict. Cant. Crew, Threpps, Three-pence.
1887. J. C. Harris, Free Joe, etc. (1888), 60. A little boy who wanted to buy a thrips worth of candy went slowly out again after trying in vain to attract the attention of the hitherto prompt and friendly store-keeper.