During the weigh-in yesterday, McGregor only wore boxers and afterward, when the two fighters squared each other up in their final face-to-face photo up, he seemed to, um, be rather aroused.

Social media pointed out while watching the weigh-in that Conor had a boner. Let’s just say people started clowning.

“Mayweather laughing at Mcgregor at weigh in because Mcgregor had a boner? That's pretty hilarious,” someone tweeted. People just paid to see Conor mcgregor sporting a murder boner during weigh in,” another wrote.

Conor McGregor takes on Floyd Mayweather at 9 pm EST tonight in Las Vegas. The match is available on PPV through Showtime.

Check out video of the face-to-face and the reaction to Connor’s arousal below.

I guess #ConnorMcGregor is REALLY pumped for his fight against #FloydMayweather tomorrow 😩

A post shared by The Shade Room (@theshaderoom) on Aug 25, 2017 at 6:04pm PDT

Mayweather laughing at Mcgregor at weigh in because Mcgregor had a boner? That's pretty hilarious. pic.twitter.com/CS18XQKHPH

— Joe U. (@_Joe_U) August 25, 2017

Yo why Connor mcgregor got a boner while right next to Floyd mayweather, you ain't slick Connor. pic.twitter.com/GWlkWzxPIE

— Max Ortega (@MaxOrtegaaa) August 26, 2017

People just paid to see Connor mcgregor sporting a murder boner during weigh in. #MayweatherMcGregor

— Joe Steyskal (@Joecocardinal) August 25, 2017

5...4...3...2...1... Let the McGregor boner memes commence!! 😨😨 pic.twitter.com/U3rFXthOsb

— Christopher Howell (@AStudyInBulls) August 25, 2017

Mcgregor with that boner? Wtf pic.twitter.com/AZBR8X3ONp

— Andrew ☂️ (@DierStraits_) August 26, 2017

Based on the massive boner McGregor had during weigh-in, I'd say he's pumped up about this fight tomorrow.

— Jason Bayly (@jasonbayly13181) August 25, 2017