birdback
The back of a birdThe back of a bird.
Meaning
1 senses(uncountable)The back of a bird.
to ride on birdback
Origin
From bird + back; compare horseback.From bird + back; compare horseback.
Wiktionary, CC BY-SA 4.0 · source
Lessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable