Blowing all the air out of your lungs and tensing your abs as tightly as possible, to the point that you can barely speak. This is generally done at pool parties or the beach, in order to look like your waist is smaller and your body fat is lower than it actually is. This is particularly used by shirtless people when a photo is being taken of them or when their crush is nearby.
Greg: Dude do you want a beer
Terry (in a quiet, strained voice): Dude I can't talk, Jenny is over there so I'm pulling a tactical ab tense.
church hurt is where you experience a degree of distance, pain, or judgement from your church community. Essentially, you are just unable to “find your place”. This is prevalent in the Christian community, but can be extended to other religions.
Now that I am an adult I am beginning to heal from the church hurt that was inflicted on me as a child.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.