Place it at the peak of a jealous confrontation, just as the rival steps forward, then follow it with Leeroy Jenkins for the mock-heroic charge or FBI Open Up Explosion if the standoff escalates further.
About this sound
A single voice shouts “you will not eat my girlfriend” for about ten seconds, with forceful, over-the-top protectiveness in every word. The effect is comic and tense at the same time: a trivial situation suddenly sounds like a confrontation, and the sheer seriousness of the warning makes it funny even before you know the context.