do the lion’s share

(idiom) to do the majority of the work when working with a group

Example Sentences:

Teacher: Did you all work together on your presentation?
Student: No, I did the lion’s share of the work. My partner did almost nothing!

The manager was unhappy when he was forced to do the lion’s share of the work by his lazy employees.

From the News:

The U.S. Produces the Lion’s Share of Top Scoring Students

Media:

Similar idioms:

1. pull one’s weight
2. top banana
3. chew someone out
4. top-notch
5. snow under