Sideb

1. Having the hots for your significant other's sibling. The reference alludes to the song Debra from Beck's late 90's album Midnight Vultures.

2. Keeping a second casual, romantic relationship on the side in addition to your primary relationship, just in case the primary one doesn't work out.

1. Kelsey is hot and all, and she's a great girlfriend, but I'm all Sideb for her sister Katelyn.

2. After Sandy dumped me unannounced back in 2013, I swore to myself I'd always keep a Sideb moving forward.

Sidebed

A term for your Minecraft girl/boyfriend who you’re cheating with on your SO. Stems from the ritual of placing ones bed next to their Minecraft girl/boyfriend to signify that they’re together.

My girlfriend asked me to hang out, but I’m storming a Woodland Mansion with my sidebed at 6