grow teeth
v. phr.β Β«A mysterious Taiwanese-born floor trader, Hwalin Lee, singlehandedly cost another CBOE clearing firm more than $50 million in a huge short position in S&P 100 puts that exploded into the money even before Oct. 19. In tradersβ jargon, the puts “grew teeth.”Β» ββThe CrashβOne Year Later: In the Pits βHow One Options Dealer Blew $9 Million” by Jonathan R. Laing Barronβs Oct. 17, 1988. (source: Double-Tongued Dictionary)