Top definition
- A smile so amazing that once seen, causes those looking to instantly smile as well

- See "Aubrey Drake Graham"
He has an infectious smile!
by bdflakjeoiajgnoaekjpwo June 12, 2011
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2
When someone with a great smile smiles and causes others to smile just because of their smile.
Darren's teeth look so good that I just want to smile. He has such an infectious smile
by quest224 August 16, 2010
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3
A euphemism for "herpes" in personal ads.

see also, contagious smile
I have herpes, so I only look for personal ads that say "infectious smile".
by FredDill August 19, 2010
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