Define Frontside Meaning

When you sit reverse or backwards on the toilet and take a dump, or masturbate.

The combination of a frontside 180 and a kickflip

Blowjob. Was used for the first time in Robins single "Frontside Ollie" in Finland.

When a girl funnels 4+oz of Dr McGillicuddy's Fireball whiskey into her vaginal entry, and then proceeds to expulse the liquid into the partner(s) mouth(s) from no less than 1 metric meter away.

It's when you're getting a blowjob and the girl takes her tongue and licks the bottom of your dick REAL SLOW from nuts to dickhead.

a snowboarding or skate trick. when you pop onto a box or rail, turning your body 90 degrees backwards, landing with your deck in a boardslide (perpendicular to the feature) facing uphill or backwards as you slide down the rail.

something that tried so hard to be good, but in the end it doesn't even matter.
Because it's just shit

when a boy and girl are having sex. The man is sitting down analing a girl and the girl is turned to the side and is jumping up and down

to snort a line of cocaine using the other nostral oppose to using the nostral you regularly snort coke with.

When the average person participates in an extreme sport(wakeboarding, snowboarding...) and rather than being experienced enough to do the Frontside 1080, McTwist, Backside whatever...he/she does the "Frontside 90 Faceplant". In my experience, your board rotates forward and you slam you face into whatever terrain you are working with (usually causing extreme pain and irritation). Thriling for onlookers. Not so much fun for you.
This trick is usually carried out at higher speeds.

While snowboarding, the impact of the Frontside 90 Faceplant may result in one more rotation causing you to lie on your back in agony.