buck teeth
When the two upper front teeth project forward to such a degree, that they are very prominent and obvious.
This may be applied to humanoids with rodent-like properties, such as bunny-girls or Nazrin.
Sometimes used in derogatory stereotypes, such as with the stereotypical nerd depiction like with the nerd emoji and the old western stereotypical depiction of asians.
See Also
This tag implicates teeth (learn more).