Nicknames for a player who calls too much instead of raising and folding

[Mike_25]

Do you have any clever nicknames for a player at the table who routinely calls too much instead of raising or folding as they should? I'm trying to come up with something witty for a friend who always falls into this habit during our games, calling when a raise would be more appropriate from a strategy standpoint. Any ideas for a polite but fun nickname I could use? I'd prefer to keep it simple and straightforward, avoiding slang terms.