Wasteful

[Jason Yan]

Full of waste; destructive to property; ruinous; as,
wasteful practices or negligence; wasteful expenses.

[Tanya Shivari]

1. An adjective to describe a person who has the characteristics of a mean and [selfish] person.
2. Also can be used to describe a [crappy] event/[happening].

[Couch Potatoe]

(of a person, action, or process) using or expending something of value carelessly, extravagantly, or to no purpose.

[Cami]

using something in a careless way and causing some of it to be wasted: