means A casual pullover or zip-up sweatshirt with an attached hood, often featuring a front pocket.

from A 20th-century compound, simply 'hood' plus the diminutive '-ie' — the same friendly suffix that gives us 'doggie' and 'selfie.' The 'hood' itself is ancient, from Old English 'hod,' related to 'hat' and to the word 'heed' (to cover, to guard the head). The garment dates to early-1900s American sportswear — companies like Champion are often credited with the hooded sweatshirt for cold-warehouse and athletic use — but the snappy clipped 'hoodie' is a much later, casual nickname that rode into wider speech alongside skate and hip-hop culture.