Instant Messaging Every swimmer knows that IM does not mean Instant Messaging. It means IM, of course, which is backstroke, breaststroke, freestyle and butterfly. Buy one of these gifts for your swimming who loves the IM event. Sort: newest | popular Showing 1 - 4 of 4 products. Instant Messaging for Swimmers T-ShirtIM does not mean Instant Messaging, at least not in swimming. ...$21.20 Instant Messaging for Swimmers T-ShirtIM does not mean Instant Messaging, at least not in swimming. ...$21.20 Instant Messaging for Swimmers T-ShirtIM does NOT mean Instant Messaging if you a swimmer. Individual ...$21.20 Instant Messaging for Swimmers Classic Round StickerIM does NOT mean Instant Messaging if you a swimmer. Individual ...$7.25Sort: newest | popular Showing 1 - 4 of 4 products.