What is the plural for timeout?
Information from Grammarist.com:
Timeout vs. time out In American and Canadian English, timeout is one word in sports-related contexts, where it means an official pause in the action. Timeouts is its plural. In all other uses, time out is a two-word noun phrase.
I think the one guy was tweaking the other. I can get a rise out of my husband insisting that "RBIs" (runs batted in) in baseball should be "RsBI." It makes him crazy. (This was answered in the EL&U question, "In baseball, is it proper to pluralize 'RBI'?")