Top Definition
v. to act so homosexual that it\'s &%$#ing ridiculous, but remaining completely and totally heterosexual.
1. While your friend randomly humps a sexy german boy you say,\"WTF!! That kid has been doing way to much Fontaineing lately.\"

2. Why do you two straight boys Fontaine so much?? Stop licking each other\'s nipples.
by Caleman and the Fontainer April 26, 2005
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