known as underage gash- someone who is of a younger age, usually annoying and immature, but still fuckable. The UG may feel they are mature, but they are not. They compensate the fact that they are immature by dressing like a slut, to seem older however, this is just an Illusion.
me:lottie is such a UG, just fuck that and leave
mike: wow i think im in love
me: bruv she just turnt 16 the otherday. dont let the UG powers draw you in