Mature People Are Weenies. The is a great gift addition to your outfit for women and men. Office work coworker humor gift for a small or big business, this saying will get laughs and your best friends will love it. Funny Coworker humor "Mature People Are Weenies" design includes text illustrations. Creative coworker design for dad, mom, husband, granddad, friend, or anyone who loves drinking, perfect for birthdays, Christmas, Thanksgiving, Halloween, and any occasion! 8.5 oz, Classic fit, Twill-taped neck