Does this movie have heavy lesbian undertones?

It has none at all.

I didn't think so.

It could be argued, but if so it's very deeply buried under the psychological tapestry of their relationship, and is never expressed (and probably has never been expressed) in any way by either character to the other. Having said that, there's a lot here about female friendships to unpack - and I think attraction is always a deep layer in friendships, especially dysfunctional ones. It's a brilliant film. Ambitious, silly, serious, and tonallly fresh. I really dug it.

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Theres some adult themes, but the competition between the two main female characters and their respective heterosexual relationships are main character points. check out "Duke of Burgundy"; it's awash in all sorts of those themes.

donkeywranglertothestars.com
@sly_3

I noticed none.

None whatsoever, though that would have been an intriguing touch.

No. Love is the last thing between these two 'friends.'

We try but we didn't have long
We try but we don't belong...

-Hot Chip (Boy from School)